[v9 optional] Bank Aliases for Certain Denoms

[czarcas7ic]

Background

The current ibc denoms are non human readable. For example, we want to be able to call uatom instead of ibc/27394FB092D2ECCD56123C74F36E4C1F926001CEADA9CA97EA622B25F41E5EB2. If state breaking, we can do this in another upgrade.

Acceptance Criteria

• ensure all ibc denoms have a corresponding human readable denom

[alexanderbez]

This is totally possible by doing a few changes to x/bank, but I think for optimization, we'd need to add an additional index, so this would be state-breaking. In fact, we would also need to add a global uniqueness constraint on aliases which would also be state-breaking anyway, so yeah 👍

I can take this too